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Most Island County residents rely on groundwater as their primary source of drinking water, making it essential that our groundwater resources are protected and monitored for quality and quantity.
Seawater intrusion monitoring is important to help protect our aquifers and drinking water and is part of Island County Code.
Does your water system need to monitor for seawater intrusion?
Check the Island County Hydrogeology Dashboard for your water system's seawater intrusion risk. When a water system is connected to more than 2 homes and the well is in an area considered to be at medium, high, or very high risk of seawater intrusion then monitoring is required. Monitoring includes collecting water quality samples to be analyzed for chloride and conductivity every April and August.
A map showing the current seawater intrusion risk across the County is available on our website.
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Monitoring water quality through regular testing is key to ensuring safe drinking water.
The Washington State Department of Health has water quality testing requirements for Group A Water Systems and recommendations for private wells. Island County has water quality testing requirements for Group B Water Systems.
Water quality results can be viewed on the Washington State Office of Drinking Water website.
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Measuring the water level in your well may be required or recommended for monitoring water quantity. A water level tape is available for Island County residents to borrow from the Island County Public Health Coupeville office.
To be a citizen scientist and have the water level in your well included in the Island County Hydrogeology Dashboard, contact our hydrogeologist.
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